Pipe-coupling.



J. V. ROBINSON.

PIPE COUPLING.

APPLICATION mm MAY a. ma.

1,216,609. Patefited Feb. 20, 1917'.

. r g g A Wi/Cwmow 1/1/11 JosEP 'v. ROBINSON, or orrnvr' oHAsE, MARY AND. I

' rrPE-ooUPLme.

cheapen the cost of production of pipe couplings; to provide an improved pipe coupling in which the pressure of the fluid in the pipes is utilized 'to tightly hold the packing of the coupling in contact and automaticallytake up the'wear thereon, andto produce a coupling of this description .in'

which the coupling members have free rotary and ,axial movement in the coupled position relative to each other. v v r In the accompanying drawings forming-a part of this specification and in which simila r reference symbols represent correspondfied form of the coupling;

ing parts in the several views: 7 e

t Figure l, is'a side view of the coupling,

partly in elevationand partly in section.

Fig. 2, is an-end view of Fig. 1. r

corresponding in outline with the head the gasket 18 with which it mates.

' Specification of LettersfPatent. Patented Feb, 20, 1917, Appli-cation'filed MayB, 1913." Serial No. 766,413.

terior, on which seat an anti-friction lubrieating packing 18, preferably of a COmpOSb 'tion of graphite and metal, ismounted. The

packing is provided-with a: tapered face for ,fitting'closely' with a correspondingly shaped.

portion 19of the nut or clamp C, as shown.

This packing abuts a'shoulder, of the coupling member B and is ,put under com- .piess1on ,wlien the .partsl are assembled. somewhat slmilar' packing ,21, preferably composed of the, same materials, ispressedf intotherecess' 22of the face of thecoupling member B and is provided with 'agroove 23 As shown es Jecia'll in Fi 1 airin or clamping nut C, is provided for clamping Th s nut V V the coupling members together.

comprises an' angu lar shank QAwhichiits closely over the member 13 and. acts against I the packinglS in dra wing thepartstogether;

The inner face 25 of the nut C lightly engages, as at 26, the'faceof the gasket 13, v so as to holdand press the latter into the recess 12 of the coupling member A. The nut is preferably made of a noncorrodible metal Fig. 3, is a longitudinal section of the -to prevent rustand corrosion betweenit and the member B, inorder to avoid liabilityof coupling member A showing the resilient metallic gasket in position. I

Fig, 4, is a longitudinal section of the clamp or nut C. v

'Fig. 5, is a longitudinal section of the coupling member B, showingthe packing rings in position thereon.

Fig. 6 1s a sectional view ShOWlIlgl modi- Referring more especially to the drawings Y A and B designate the coupling members each of which is threaded at 10 to receive the and have relative axial and rotary or swivel movement in the coupled posit on. The member A is provlded with anenlarged externally threaded end or -head l1, recessed at 12 toreceive a cup shaped resilient metallic coupling member A. The-"face 15 of the gasket extends in advance of the face of the aforesaid coupling member and dished, as shown in Fig. 3; r

The coupling member B is provided with is slightly a raised seat 17 extending around its ex interference with the freeiswiveling of the latter ;in the nut.

The .nut tightly engages the face of the coupling-member A at 27 to j preventthe escapeof a fluid thereat, and is.

internally threaded, as shown, to mate with the threaded portion of the member A.

In operation the coupling: is assembled in V the usual manner. As the nutC is screwed home, the membersjr and 'B are drawn toward each other, bringing the packing 21 .into tight engagement, with the head 16 of the gasket andpressing backtheface of the latter until'it lies substantially in the plane of the face of thecoupling member A. The tendencyof the gasket to resume its normal position (shown in Fig. ,3), holds it intight engagement with thepacking 21 andmain 1 tainsthe packing 18 under pressure between the nut'C and-the coupling ine1nber;B,fefiect-' ingan air tight joint atthat pointalso. The springaction of the gasket in both of these respectsis greatly augmented by'the pres- 12 being suflicient in diameter to expose sub stantia'llyrthe full face of thegasket to the pressure of the fluid-in the members. i The sure ofthe, fluid in,thec'oupling, the recess force of such pressure along the inner face of the gasket is several times the pressure tending to escape at 28, under which the 7 gasket may be said to have a piston action which automatically takes up any wear on plumbing and steam fitting trades, I have designed it with particular attention to the requirements of connecting flexible metallic pipes to take the place of rubber hose for conveying air and steam from one'railway car to another. In adapting it for this service I am aware that the coupling members A and B will, in some instances, have to be made in the form of elbows, or pipe sections and that when used in either of these services, the packing 18 may be extended over the shoulder 20 of the coupling 13 into engagement with the gasket 13 at 26 or the coupling member A at 27, and put under pressure to minimize the wearon the shoulder 20 of the coupling membe'rB and increase the tightness of the joint. In Fig; 6 I have shown the packing 18 arranged as indicated above. 7

WVhat I claim as new and desire to secure by Letters Patent is z y 1. A pipe coupling, comprising two detachably connected coupling members, each of said :members having an annular recess "in its end contiguous to the other coupling member, and a metallic gasket having a cylindrical portion secured in one of said recesses, and an annular bead opposite the other recess.

2. A pipe coupling, comprising two detachabl y connected coupling members, each of said members having an annular recess in itsend contiguous to the other coupling member, and a metallic gasket having a cylindrical portion secured in one of said recesses, and an annular bead opposite the other recess, said latter recess having a packing adapted to form a seat for said bead.

8. A pipe coupling comprising two coupling members, a clamping ring having threaded engagement wlth one of said members, an annular lubricating packing between said ring and the other member, a flexible metallic gasket securely connected to one of said members and having an an nular portion seated against the other member, said packing and gasket permitting one member to turn relatively to the other while maintaining a tight joint between the members.

l. A pipe coupling comprising two coupling members, a clamping ring having threaded engagement with one of said members, an annular lubricating packing be tween saidrring and the other member, a flexible metallic gasket securely connected to one of said members and having an annular portion, that overlaps the end of the other member, the latter having an annular packing seated in its end against which said gasket. seats, said coupling members being free to turn relatively and said flexible gasket being normally pressed against the packing in the opposing member by the fluid within the coupling.

5. In a pipe coupling a hollow coupling member having an enlarged end provided with an annular internalrecess, in combination with an annular sheet metal gasket having a cylindrical portion and a face portion, the opening in the latter being of less diameter than the cylindrical portion, the cylindrical portion of said gasket being seated in said recess, and a clamping ring seated insaid recess within saidcylindrical portion.

6. A pipecoupling comprising two coupling members, and means for connecting them together, one of said coupling members having an enlarged end and the other coupling member being of substantially uniform internal diameter, arthin metal gasket having a cylindrical flange seated in the enlarged end of the one coupling member and having a face portion extending transversely of and bearing against the end of the other coupling member.

7 A pipe coupling comprising two coupling members, and means forconnecting them together, one of said coupling members having an enlarged end and the other coupling member being of substantially uni form internaldiameter, a thin metal gasket having a cylindrical flange seated in the enlarged end of the one coupling member and having a face portion bearing against the end of the other coupling member, said gasket having an annular bead and said latter coupling'member having an annular packing in its endagainst which said bead seats,

for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses. JOSEPH V. ROBINSON.

l/Vitnesses:

M. C. SHERIDAN, J. L. HENNING.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.? 

